I am typing this from GhostBSD 11.1 Live Session booting from a USB Flash Drive (use Legacy BIOS entry NOT the UEFI BIOS enty) selecting a USB Flash Drive.

My HowTo connect an Atheros PCI AR9565 to a T-Mobile Hot Spot from the cell phone with WPA encryption.
This is my manual setup issuing commands. I don't know how GhostBSD in the Live Session has NetworkMgr setup to help with a Wi-Fi access point connection. Maybe NetworkMgr is doing some heavy lifting in the background that I have not a clue about. I don't see the normal NetworkMgr Icon in Blue in the upper right hand control panel. So Eric and other GhostBSD 11.1 Live Session users help us out with testing and comments.

My question does networkmgr work out of the box in the Live Session GhostBSD 11.1 booting from a USB Flash Drive? What setup was I missing? How do you do it for a Live Session GhostBSD? I showed you my manual setup above that seems to work ok.I assume if I install GhostBSD 11.1 to some hard drive and then update per the github clone description that I will have an operational NetworkMgr with icons and wireless scan information. Is this true?

NetworkMgr should work out of the box if the kernel module is loaded. But to be noted that NetworkMgr 2.5 only supports one wired card and one wifi card witch next NetworkMgr will support multiple cards setup and in the tray icon menu.

I am looking for some tests or diagnostics to get the networkmgr working properly to display an ICON.
Here is http://www.linuxsecrets.com website showing GhostBSD 11.1 Installation. His pictures / images show the Blue Icon for Networkmgr in the icon tray. What is missing in the setup and installation of GhostBSD 11.1 from the 2017 image.https://www.linuxsecrets.com/3190-install-ghostbsd See the Blue Arrows ICON in the image below? I don't have that on my Ghost BSD 11.1 system. Look above and you will see the /usr/local/bin/networkmgr process running. I killed it and restarted it to see if I could list the errors. Which you have above. I am running an Atheros PCI Wifi chip AR9565.
I can manually make the wifi connection using the tools ifconfig, dhclient. and editing the file /etc/wpa_supplicant.conf .

What I am trying to show is a problem with Wifi connection using the GhostBSD 11.1 live session and the GhostBSD 11.1 installed to an external USB Hard Drive. Hopefully, this is a small error or change need to make to a configuration file. Ask me for more information to help me identify the problem with getting the NetworkMgr Icon up. Otherwise, using the manual method works. I can also now install / upgrade NetworkMgr from your GitHub site, which should make it work. What do you suggest to try Eric. I would like to fix this error and document here, So that other GhostBSD users can be helped.

{Solved] when looking at the source card file /usr/local/bin/netcardmgr.py I see tha t it checks for Ethernet LAN card devices, but my Dell Inspiron 11 3000 series does not have ANY LAN device in the notebook motherboard. See the results below of running these two commands.
root@fred:~ # ifconfig -l
lo0 wlan0
root@fred:~ # sysctl -in net.wlan.devices
ath0
root@fred:~ #

In the file /usr/local/share/networkmgr/net_api.py there is a test for the LAN card
around line 79 is a test for a LAN card using the wirecard(): function
I modified this to suit my needs for my Laptop that does not have a LAN ethernet device.
This python program /usr/local/bin/networkmgr kept crashing on me. I never did see any Blue Tray Icon. So I made the following modifications to get past this wired LAN device check to configure my WiFi Atheros QCA9565 PCI device. Now I see the Blue NetworkMgr Tray Icon and can click on it to make changes and see what WiFi access points exist

See the file size of "grep_temp.txt" is zero, an empty string.
The "grep -v wlan" prints lines that DONT MATCH "wlan" which should leave lines of text with the LAN device. Since there is no existing LAN device on my laptop, this grep search returns an empty string of zero characters. This a problem for the existing networkmgr code on my laptop.
I will now download and try out the newer version of networkmgr from Github GhostBSD and see if the multicard feature deals correctly with the NO ethernet LAN Device, but one WiFi LAN device, correctly.

Yahoo, it is ALIVE. NetworkMgr version 1.10 is working for me on my Dell Inspiron 11 3000 series laptop.https://github.com/GhostBSD/networkmgr#networkmgr
Follow the instructions at the above listed GitHub Website. Completed this NetworkMgr install in about 5 minutes.
Wonderful tool to use.